Molder&#39;s flask



March 26, 1929. N E 1,707,179

MOLDER S FLASK Filed Oct. 1925 '2 Sheets-Sheet 1 INVEN TOR. ,2 .Zr/uns f5 ffi/VLEY,

A TTORNE Y.

March 26, 1929. J. F. STANLEY MOLDERS FLASK Filed Oct. 1925 2 Sheets-$heet 2 x .M R 1 W M m I x m r m V 5 T m M a w 1 i my a Patented Mar. 26, 1929.

"UNITED STATES PATENT OFFICE.

JAMESF. STANLEY, 0F INDIANAPOLIS, INDIANA, ASSIGNOR T0 LAVELLE FOUNDRY COMPANY, OF INDIANAPOLIS, INDIANA, .A CORPORATION OF INDIANA.

MOLDERS FLASK.

Application filed October 8, .1925. ,Serial No. 01,355.

It .is the object of my invention to producea molders flask in which the two parts may be put together accurately and easily. and may be separated easily without jarring, tilting, or lateral swaying; to provide an improved construction of flask generally, and especially an improved construction of tapered flask; and to provide more eflicientmeans for preventing the sand from dropping out of the cope when the latter is lifted from the drag, especially in a apered flask.

In carrying out my invention, I provide the drag with two exterior upstanding parallel pins, desirably round pins, the inner surfaces of which co-operate with guide plates adjustably mounted on the sides of the cope to guide the movements-of the two parts of the flask as they are put together and taken apart. One important feature of my invention is the adjustable mountingof these guide-plates. The cope is also pro-. vided with fingengrip parts in suitable proximity to the upstanding pins from the drag, so that in lifting the cope from the drag the moldermay rest his hands on the ends of the pins with his fingers gripping these finger-grip parts,.so that a long initial.

lift of the cope maybe obtained by a mere closing of the molders hands, and without interference from the guideplates. To tacilitate this further, I desirably provide spe cial slide-plates, which are carried by the cope but.relatively movable thereon and co operate with the outer sides of the upstanding pins fromthe drag to provide a further guiding means for the movement of the cope and alsoto provide a wider area of support for the molders handsithan is provided by the ends of the pins then'iselves,although the imoldcrs hands may still be supported lrvtheupstanding pins through the medium of these slide-plates. i

These guiding and lifting means are applicable to flasks of various constructions, butparticularly so to tapering flasks, wh' re the separating movementbetween the two parts must beeven more accurate than in non-tapering flasks. Theretore my inven tion (amtem ilates also a special construction of such tapering flask, with round corners; whichround cornersnot only save sand but also facilitate the removal of the flask from the imold without ,breaking the latter. While round-cornered flasks have heretofore been thought desirable, their cost has been prohibitive; andiny invention involves a more effective and less expensive process of makingsuch flasks and maintaining them in shape, so that the molds produced by a number of flasks may all be of uniform size and shape to receive, interchangeably, suitable tapered jackets which are put upon them .prior 'to the pouring of the iron into the moldsflThis method of making the flasks consists in casting them of suitable malleable metal, as aluminum, aluminum alloys, or brass, and shaping the cast molds ac place on the drag, and with the sand-hold-- ing withdrawable flange of the cope in its inner orsand-holding position; Fig. 2 is a plan of the cope inverted, with the sand holding withdrawableflange in its outer or sand-relasing position; Fig. 3 is an elevation of the fiaskshown in Fig. 1; Fig. 4: is an enlarged vertical central section t-l'irough one side of the flask at the guiding and positioning means, with the cope resting on the drag,the section being taken on the line ll of Fig. 7 Fig. 5 is a view similar to Fig. ,4, but with the cope partly lifted from the drag; Fig. 6 is afragmental elevation of the guiding and positioning means shown in Figs. 4 and 5, as viewed from the right of Fig. 4; Fig. 7 is a frag-mental section on the line 7-7 of Fig. 4; Fig. 8 is a tragmental section corresponding to a portion of Fig. 4- at the junction ot' the drag with the cope, showing the sand-holding withdrawable flange Withdrawn; and Fig. 9 is a view, on a reduced scale, showing the flask on the forming mandrel.

The flask, as usual, is made oftwo parts, thelower part or drag 10, and the upper par-tor cope 11. These two parts are made internally tapering, as frustums of the same round-cornered. rectangular pyramid, for the corners of the .flask are rounded, and areshaped that the internal .taces of the other when the flask and cope are together,

' as appears most clearly from Fig. 4. The

xii

I them prohibitive;

' cope on the drag.

flask and cope are desirably made of arela tively thin shell of cast metal, with reinforcing flanges-12, 13, 14, and 15 at their upperand lower edges. The cast metal used is malleable, and desirably one that takes a relatively smooth cast surface, such as aluminuniand its alloys and brass. The shells forming the drag and 'cope are sufficiently light so that they may readily be hammered into accurate shape over a mandrel 16 (Fig. 9) having'its'exterior surface in the shape of the round cornered pyramid of which the inner surfaces of the drag and cope are to constitute frust'ums. In this way, the drags and'copes may be made and kept accurate to the same' shape and size if l'OllIld-COIIlGIGd pyramids, so that the molds produced in such flasks, or in a number of 'suchfflasks, are all uniform, and may interchangeably and tightly receive suitable slip-jackets of the same colresponding round-cornered"pyramidal shape to hold the molds together, against the internal pressure created when they are poured; The slip-jackets may be kept in shape on the same mandrel. The mandrel 16. is desirably considerably longer than a flask, so that a single mandrel may serve for a number of different sizes of flasks and slip-jackets.

This accurate shaping of the molds may thus be done comparatively cheaply, thus making it possible to form such roundcornered 'molds without expensive machine operations which have heretofore made "To make possible this accurate shaping of the final molds, as well as-for simplifying the work of the molder and saving him labor, it is necessary to provide accurate guiding and positioning means to control the relative positions and movements of the To this end, I provide on opposite outer sides of the drag 10 two horizontally projecting flanges 20, which each receives and holds rigidly an upwardly projecting pin 21. The mounting of the two pins 21 in the two flanges 20 is such that suchpins are parallel, and are substantially perpendicular to the plane of separation between the drag and cope. The pins 21 are desirably round pins, and their mountings in the flanges are by any convenient shouldered mounting which permits the pins 21 to be rigid'with the drag.

- two opposite sides of the cope.

- The inner sides of the pins 21 co-operate v with long guide-plates 22 mounted on the cope 11. There are two of thesevguideplates 22, one for each pin 21; and they are supported on flanges 23 projecting from The guideplates 22have concave. guiding faces which co-operate with the inner sides of thepins' 21 and as shown are in the form of segments of cylinders of slightly less than 180; and. the axes of these cylinders are respectively substantially co-incident with the axes of the pins 21 when the cope is on the drag or is being put thereupon or removed therefrom. To obtain this mounting, the upper faces of the flanges 23 are machined to cooperate with the lower faces of flanges 24 which project from the guide-plates 22 away from the pins 21; and each flange 24: is clamped to the corresponding flange 23 by two clamping bolts 25. At least one of the flanges 23 and 24 has slots 26 for such clamping bolts 25, which slots are transverse to the face of the cope to: permit adjustment of the clamping plate 22 as a whole toward and from the cope. To obtain such adjustment, the flange 24 of each guide-plate 22 has two upstanding ears 27, which receive thrust-screws 28 for hearing against the outer face of the cope 11, desirably on a machined spot 29. The thrust-screws 28 may be provided with suitable lock-nuts 30 if desired. By loosening the clamping bolts 25, the thrust-screws 28 may be adjusted as desired to get the proper (p-operation between the concave faces of the guide-plates 22 and the inner faces of the pins 21.

To facilitate lifting the cope from the drag, the flanges 23 are continued around the pins 21, to the outer sides thereof, of course with suitable openings for such pins. These outwardly continued flanges 23 provide convenient finger-grips, for the molders fingers to grasp in lifting the cope; and enable him to do so by a mere closing movement of his fingers, since he can rest the palms of his hands on the ends of the upstanding pins 21. It is possible to get a long initial lift of the cope in this way; because, since the guide-plates 22 co-operate with the inner faces of the pins 21, the upper ends of such guide-plates may pass by the molders hands without interference. To make this lifting still easier, and especially to protect the molders palms, I desirably slidably mount slide-plates 35 in the flanges 23, preferably in the pin-receiving holes of such flanges 23 to co-operate with the outer sides of the pins 21. These slide-plates 35 are relatively slidable vertically in the flanges 23 as is indicated in Figs. 4 and Desirably the slide- 7 plates 35 have upper and lower limit-flanges lie pressureonhispalms, when heliftsthe cope from the drag by the aforesaid finger movement. Such limit is desirablyprovided by inwardly "projecting cap-flanges 38on the slide-plates in position to engage the upper ends of the pins 21 and thus to hold the slide-plates raised as shown in both Figs. at and 5, even-though the cope is lowered as shown in Fig. 4. Pairs of guide-pins 39 projecting downward from the flange 36 through guide holes in the extended flange 23 to rest on an'extension of the usual pattern plate may also be provicled;-and these may serve to limitor tohelplimitthe downward movementof the slide-plates 35 on the pins2'1.

By reason of the guide-plates 22 and slideplates 35, it becomes possible tolift the cope accuratelyand gently from thedrag, and to replace it accurately and gently on the drag, with asubstantially straight-line movement, without. tilting orjairring thecope or swaying it from side to side. This makes for better molds, by requiring less skilland care on the part of theinoldcr and by positively preventing any carelessness or'unskillfulness on the inolders part from causing such tilting, swaying, orjarring. i a For the same reason of facilitating the inolderswork-thelflanges 2O ofthc dragdesir-ably have outwardly projecting portions 40, to provide finger grips which the inolder may conveniently grasp with his fingers Whenhedesires to lift the flask ash whole fromthe completedfmold.

lhe use of a taperedmoldmakes the sand within the cope mor'e prone to dro out of the cope whenthe latter is lifted from the drag. To prevent this, I provide a Withdraw'able flange on that faeeof the-cope which co-operates with the face of the drag. This withdrawable flange is made in two parts, each extending along two adjacent sides'ofthe cope face,-as is clear from F ig; 2. These two flangepartsare fastened to the cope flange 14 by headed screws 46, which projectthroughundercut slots 47 provided in-the parts of'the flange-45. All the slots 4: 7 in each part of the flange 45 are parallel, and they are oblique to the sides of the'flask so that'the movement permitted bysuchslots causesthat part ofthe flange 45ers a whole to be moved inward or out ward with relation to both the corresponding sides of the cope. Thati-s, the obliqueness of the slots 47 is such that those slots are transverse to the lineof divisionbetweenthe two parts of the/flange 45. Toobtain the movement of each part of the flange 45, that flange-part is provided at the junction between its two sideswitha slot 48 whose direction is transverse to the directionof the slots 47; andthis slot 48 receives an eccentric pin 49 on a rotatable shaft 50 mounted in the flanges 14 and 15 and operable by a handle 51. By turnii'igthe handle 51. from the position shown in the lower right-hand corner of Fi 2 to the position shown in the upper left-hand corner of'such figure, the eccentric pin 50 is moved outward to cause the associated part of the flange 45 to be correspondingly drawn outward to sand releasing position, as permitted by the slots 47 while by the reverse movement of the handle 51 the flange part is moved inward tosand-holding position. That is, when the handle 51 is moved to the position shown in Fig. 1 and in the lower right-hand corner of Fig. 2, the withdrawablc flange is projected inward past the surfaceof the roundcornered pyramid formed by the inner face of the cope, asis indicated in Figs. 4t and 5; whereas when the handle 51 is moved to its other position, shown in the upper left-hand corner of Fig. 2, the flange 45 is withdrawn so that its inner edgedoes not project inward beyond the surface of such pyramid, as is indicated in Fig. 8.

V The flange 45 is made of substantialthicb ness, for rigidity, and. so that the slots 47 may be undercut to receive the heads of the screws a6. However, it is usually desirable that that part of the flange which projects inward beyond the surface of the pyramid of the inner surface of the cope should be of less thickness. Therefore, I cutaway the upper inner corner of the withdrawable flange 45, as is clear from Figs. 4, 5, and 8, to provide merely a thin sand-retaining ledge. The cutting away is desirablyin the form of a concave chamfcr. This concave chamfer makes a rounded corner betweenthe sides and the bottom of the cope-part of the completed mold. a

In addition, it is desirable to provide notches 55 in the inner edges of the with drawable flange 45. These leave vertical ridgesof sand in the completed mold across what-would otherwise be a completely encircling equatorial channel around the mold at the junction of the copepart with the drag-part thereof. .In theeventofa bustout in pouring, in molds without these ridges, the iron would run completely around this channel beneath the enclosing sli 'i-jacket; but the ridgeslimit such unwanted flow of iron tothe channel-portion between two adjacent ridges.

a In operation, the flask is filled. with sand to embed the pattern in the usual manner. During the filling of the cope, the with drawableflange 45 is desirably in its inward or sand-holding position. vVhen .thecope has been suitably filled, the operator grasps the flanges 23 of thecope as indicated in Fig. 4, with his palms resting on the flanges 36, and by a finger movement lifts the cope from the drag, as is indicated in Fig. 5. During this movement, the flange 45 effectively holds the sand inthe cope, and the guide-p1ates 22 and slide-plates 35 effectively prevent tilting and swaying of the rising cope. After the cope has beenbrought to the position of Fig. 5, it is lifted further by a the usual arm movement of the molders Then the pattern is removed, and the cope is put back onthc drag. In putting the cope back on the, drag, the reverse of the, aforesaid I as a. whole from the mold.

movement takes place, the molder first putting the cope over the drag with the slideplates and guide-plates 22 on the pins 21, during which time his hands and fingers hold the flanges 23 and 36in engagement,

and then opens his fingers to let the cope gently down on the drag, without tilting or on corresponding sides of the cope for cooperating with the inner sides of said pins, and finger-grip flanges on said cope in posi tion to receive the molders fingers when he p'utshis palms on the upper ends of said pins.

2. In a molders flask, the combination of a drag,;acope, twoparallel pins projecting upward from sides of the drag, guide-plates on corresponding sides of the cope for co operating with the inner sides of said pins,

finger-grip flanges on said cope in position to receive the molders fingers when he puts his palms on the. upper ends of said pins, and slide-plates slidably mounted in said finger-grip flanges toco-operate with the outer sides of said pins, said slide-plates having means to limit the movement of the slide-plates on said pins to less than that of the guide-plates and cope on said pins and furnishing palm-rests for the molders palms when heputs them on the pins.

, 3. In a molders flask, the combination of I a drag, a cope, two parallel pins projecting upward from sides of the drag, guide-plates on corresponding sides of the cope for cooperating with said pins, finger-grip flanges on said cope in position to receive the moldj ers fingers when he puts his palms on the upper ends'of said pins, and slide-plates slidably mounted in said finger-grip flanges to co-operate alsowith said pins, said slide plates having means to limit the movement of the slide-plates on said pins to less than that ofthe guide-plates and cope on said pins and furnishing pahn-rests for the molders palms when he puts them on the pins.

4. In a molders flask, the combination oi a'drag, a cope, two parallel pins projecting upward from sides of the drag, and guideplates on corresponding sides of the cope tor co-operating with the inner sides of said pins, said pins being round and the co-operating surfaces of said guide-plates being correspondingly concave.

5. In a molders flask, the combination of a drag, a cope, two parallel pins projecting upward from sides of the drag, said cope having horizontally projecting flanges on sides corresponding to the pin-carrying sides of the drag, guide-plates co-operating with said pins and having supporting flanges supported on the flanges on the cope-sides, clamping bolts for clamping the guide-plate flanges to the cope flanges, said clampingbolts having a slotted mounting in one oi? said flanges to permit adjustment, and thrust screws mounted in said guide-plates for bearing against the cope-sides to produce such adjustment.

6. In a molders flask, the combination of a drag, a cope, two parallel pins projecting upward from sides of the drag, guide-plates on corresponding sides of the cope for cooperating with the inner sides of said pins, said pins being round and the co-operating surfaces. of said guide-plates being correspondingly concave, said cope having horizontally projecting flanges on sides corresponding to the pin-carrying sides of the drag, guide-plates co-operating with said pins and having supporting flanges supported on the flanges 011 the cope-sides, clamping bolts for clamping the guide-plate flanges to the cope flanges, said clampingbolts having a slotted mounting in one of said flanges to permit adjustment, and thrust-screws mounted in said guide-plates for bearing against the cope-sides to produce such adjustment.

7. In a molders flask, the combination of a drag, a cope,two parallel pins projecting upward from sides of the drag, and guideplates on corresponding sides of the cope for cooperating with the inner sides of said pins, said pins being round and the cooperat ing surfaces of said guide-plates being correspondingly concave, said guide-plates being arranged to co-operate with the inner sides of such pins.

In witness whereof, I have hereunto set my hand at Indianapolis, Indiana, this 3rd day of October, A. D. one thousand nine l hundred and twenty-live.

JAMES F. STANLEY. 

